# XBee - Cellular **URL:** https://forums.digi.com/c/xbee-xbee-gateway/xbee-cellular/73.md [Latest](https://forums.digi.com/latest.md) · [Categories](https://forums.digi.com/categories.md) · [Tags](https://forums.digi.com/tags.md) --- ## [About the XBee - Cellular category](https://forums.digi.com/t/about-the-xbee-cellular-category/108)
**Author:** [@system](https://forums.digi.com/u/system)\ **Replies:** 0
This category is about the Digi XBee Cellular products. --- ## [How to update to 37.00.128 rev 2 on XB3-C-GM1-UT-001](https://forums.digi.com/t/how-to-update-to-37-00-128-rev-2-on-xb3-c-gm1-ut-001/38584)
**Author:** [@AthenaIndustrial](https://forums.digi.com/u/AthenaIndustrial)\ **Replies:** 7\ **Last updated:** [July 20, 2026, 11:48am UTC](https://forums.digi.com/t/how-to-update-to-37-00-128-rev-2-on-xb3-c-gm1-ut-001/38584 "2026-07-20T11:48:05Z")
We have 50 XB3-C-GM1-UT-001 radios that have been updated to the latest FW 11721 and Modem FW 37.00.128 (the latest xx8 release from Telit) With this release we are now able to use multi-provider sim cards, it works … --- ## [XB3-C-GM2-UT-001 Band support mismatch](https://forums.digi.com/t/xb3-c-gm2-ut-001-band-support-mismatch/38586)
**Author:** [@bevenson](https://forums.digi.com/u/bevenson)\ **Replies:** 5\ **Last updated:** [July 20, 2026, 11:44am UTC](https://forums.digi.com/t/xb3-c-gm2-ut-001-band-support-mismatch/38586 "2026-07-20T11:44:54Z")
According to the XB3-C-GM2-UT-001 specifications and user manual, this module should support the following cellular bands: LTE Bands: B1, B2, B3, B4, B5, B8, B12, B13, B18, B19, B20, B25, B26, B27, B28, B66, B71, B85; … --- ## [ATHS lookup table?](https://forums.digi.com/t/aths-lookup-table/38544)
**Author:** [@bevenson](https://forums.digi.com/u/bevenson)\ **Replies:** 2\ **Last updated:** [July 2, 2026, 1:32pm UTC](https://forums.digi.com/t/aths-lookup-table/38544 "2026-07-02T13:32:16Z")
We have a mix of the legacy XB3-C-A2-UT-001 and the current XB3-C-GM2-UT-001 deployed in the field. I’m trying to identify which is which for a site with AT commands. I don’t see any AT command that reports this version … --- ## [XBee 3 LTE-M/NB-IoT: MAIN.PY wont respond to SMS when in AP=0 Transparent Mode](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-main-py-wont-respond-to-sms-when-in-ap-0-transparent-mode/38470)
**Author:** [@jackson](https://forums.digi.com/u/jackson)\ **Replies:** 8\ **Last updated:** [June 2, 2026, 2:13pm UTC](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-main-py-wont-respond-to-sms-when-in-ap-0-transparent-mode/38470 "2026-06-02T14:13:41Z")
XBee 3 LTE-M/NB-IoT cellular module. Using XBee Studio and the Xbee TH Dev Kit board. PS=1 MicroPython Auto-Start enabled Main.py executes fine when in AP=4 MicroPython REPL mode. The module responds correctly to a “… --- ## [XBee 3 LTE-M/NB-IoT: Reading module AP setting causes outbound TCP conenction to open](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-reading-module-ap-setting-causes-outbound-tcp-conenction-to-open/38468)
**Author:** [@jackson](https://forums.digi.com/u/jackson)\ **Replies:** 6\ **Last updated:** [May 22, 2026, 1:10pm UTC](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-reading-module-ap-setting-causes-outbound-tcp-conenction-to-open/38468 "2026-05-22T13:10:24Z")
XBee 3 LTE-M/NB-IoT cellular module. Using XBee Studio and the Xbee TH Dev Kit. DL=98.122.42.xxx Dest IP OD=0.0.0.0 Operating dest IP DE=50 Dest port C0=51 Listen port AP=0 Transparent mode PS=0 Micropy… --- ## [XBee 3 LTE-M/NB-IoT: Transparent mode with MicroPython keepalives](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-transparent-mode-with-micropython-keepalives/38412)
**Author:** [@jackson](https://forums.digi.com/u/jackson)\ **Replies:** 4\ **Last updated:** [May 13, 2026, 2:32pm UTC](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-transparent-mode-with-micropython-keepalives/38412 "2026-05-13T14:32:47Z")
I have Transparent Mode (AP=0) working to read sensor data over cellular from our server. I need to use Auto-Start (PS=1) MicroPython to initiate the outgoing cellular TCP connection, and send keepalives keep it open. T… --- ## [Where is RS-485 ENABLE (was DIO7) on cellular XBee 3 LTE-M/NB-IOT?](https://forums.digi.com/t/where-is-rs-485-enable-was-dio7-on-cellular-xbee-3-lte-m-nb-iot/38399)
**Author:** [@jackson](https://forums.digi.com/u/jackson)\ **Replies:** 3\ **Last updated:** [May 12, 2026, 2:26pm UTC](https://forums.digi.com/t/where-is-rs-485-enable-was-dio7-on-cellular-xbee-3-lte-m-nb-iot/38399 "2026-05-12T14:26:41Z")
I’ve used many XBee/XBee3 900 MHz, 2.4 GHz, etc. You could set DIO7 to 7 “RS-485 Enable, High” on all of them. When data is ready to go out via serial, this pin would go high. This puts the RS-485 transciever chips in… --- ## [Digi XBee 3 Global LTE-M/NB-IoT not connecting to mobile network](https://forums.digi.com/t/digi-xbee-3-global-lte-m-nb-iot-not-connecting-to-mobile-network/38326)
**Author:** [@JTWiSA](https://forums.digi.com/u/JTWiSA)\ **Replies:** 5\ **Last updated:** [April 22, 2026, 12:26pm UTC](https://forums.digi.com/t/digi-xbee-3-global-lte-m-nb-iot-not-connecting-to-mobile-network/38326 "2026-04-22T12:26:17Z")
I am having some dramas with a few of the units I have here. When they are set up, they don’t connect to the Cellular network. I have set up about 60 of these units, all identically and under the same conditions, and I … --- ## [Is the XBee 3 Global LTE-M/NB-IoT cellular Python programmable only?](https://forums.digi.com/t/is-the-xbee-3-global-lte-m-nb-iot-cellular-python-programmable-only/38280)
**Author:** [@D2K](https://forums.digi.com/u/D2K)\ **Replies:** 4\ **Last updated:** [March 25, 2026, 5:20pm UTC](https://forums.digi.com/t/is-the-xbee-3-global-lte-m-nb-iot-cellular-python-programmable-only/38280 "2026-03-25T17:20:36Z")
Can the XBee 3 Global LTE-M/NB-IoT cellular product be programmed in C via the CodeWarrior IDE (Freescale) plugin like the Xbee S3B 900HP programmable, or is it strictly limited to Python? --- ## [TLS 1.2 setup on XBEE 3 NB-IoT/LTE cellular radio](https://forums.digi.com/t/tls-1-2-setup-on-xbee-3-nb-iot-lte-cellular-radio/37790)
**Author:** [@AthenaIndustrial](https://forums.digi.com/u/AthenaIndustrial)\ **Replies:** 17\ **Last updated:** [February 3, 2026, 7:42am UTC](https://forums.digi.com/t/tls-1-2-setup-on-xbee-3-nb-iot-lte-cellular-radio/37790 "2026-02-03T07:42:24Z")
We have a number of radios running in the field and lab that are working making MQTT connection to an Azure IoT Hub. Azure now requires us to have a minimum TLS of 1.2 where it was previously 1.0 I updated the Azure IoT… --- ## [The QSTR restriction between two chips](https://forums.digi.com/t/the-qstr-restriction-between-two-chips/38140)
**Author:** [@hlyu-coencorp.com](https://forums.digi.com/u/hlyu-coencorp.com)\ **Replies:** 1\ **Last updated:** [January 15, 2026, 1:56pm UTC](https://forums.digi.com/t/the-qstr-restriction-between-two-chips/38140 "2026-01-15T13:56:30Z")
Dear support team, we are using the Digi XBee 3 Global and Low-Power LTE-M/NB-IoT on our IOt devices. With os bundle(), we have used 377/400 of QSTR, it is a bottleneck now if we want to bundle more. Then I noticed t… --- ## [Relay.Send failing with larger messages](https://forums.digi.com/t/relay-send-failing-with-larger-messages/37502)
**Author:** [@AthenaIndustrial](https://forums.digi.com/u/AthenaIndustrial)\ **Replies:** 9\ **Last updated:** [October 13, 2025, 10:54am UTC](https://forums.digi.com/t/relay-send-failing-with-larger-messages/37502 "2025-10-13T10:54:16Z")
I have an application running on a microcontroller using an XBEE 3 Cellular modem. It has been working well for years. In the past couple days we have been getting errors when trying to send packages from MQTT down the u… --- ## [Does FCC compliance hold without the use of 1 or more radios](https://forums.digi.com/t/does-fcc-compliance-hold-without-the-use-of-1-or-more-radios/37913)
**Author:** [@lawofmurphyfan](https://forums.digi.com/u/lawofmurphyfan)\ **Replies:** 1\ **Last updated:** [October 13, 2025, 10:51am UTC](https://forums.digi.com/t/does-fcc-compliance-hold-without-the-use-of-1-or-more-radios/37913 "2025-10-13T10:51:03Z")
I know that the Digi XBee 3 Global and Low-Power LTE-M/NB-IoT module comes with FCC modular precertification. My question is, if I am only using the cell radio and disconnecting the BLE and GNSS antennas, does the module… --- ## [Xbee 3 Global LTE-M/NB-IoT Low Power - Operation in Canada](https://forums.digi.com/t/xbee-3-global-lte-m-nb-iot-low-power-operation-in-canada/36982)
**Author:** [@Larry\_Sellers](https://forums.digi.com/u/Larry_Sellers)\ **Replies:** 3\ **Last updated:** [May 28, 2025, 5:00pm UTC](https://forums.digi.com/t/xbee-3-global-lte-m-nb-iot-low-power-operation-in-canada/36982 "2025-05-28T17:00:14Z")
Hello, We sent some devices with XBee 3 Global LTE-M/NB-IoT Low Power modules up to Canada and I am not having luck with them connecting to any cellular network up there. I am wondering if there are any specific setting… --- ## [Not reading modem data / not connecting to cellular network](https://forums.digi.com/t/not-reading-modem-data-not-connecting-to-cellular-network/36392)
**Author:** [@damjanmi](https://forums.digi.com/u/damjanmi)\ **Replies:** 3\ **Last updated:** [April 17, 2025, 11:56am UTC](https://forums.digi.com/t/not-reading-modem-data-not-connecting-to-cellular-network/36392 "2025-04-17T11:56:52Z")
Hi, We have Digi XBee 3 LTE-M/NB-IoT low power module and have problems getting modem to work. When we power modem (3.3V) sometimes it work’s other time it doesn’t connect to cellular network nor it displays IMEI, ICCID… --- ## [XB3-C-GM2 (global) vs XB3-C-GM1 (low power)](https://forums.digi.com/t/xb3-c-gm2-global-vs-xb3-c-gm1-low-power/36011)
**Author:** [@beard007](https://forums.digi.com/u/beard007)\ **Replies:** 1\ **Last updated:** [March 19, 2025, 12:17pm UTC](https://forums.digi.com/t/xb3-c-gm2-global-vs-xb3-c-gm1-low-power/36011 "2025-03-19T12:17:05Z")
Hopefully a simple question - would Global Xbee3 version actually consume more power than the Low-Power version if used in the US on the same networks? The only difference spec-wise as far as I can see is the peak power… --- ## [Xbee cellular module TCP UDP](https://forums.digi.com/t/xbee-cellular-module-tcp-udp/33899)
**Author:** [@pgagne007](https://forums.digi.com/u/pgagne007)\ **Replies:** 14\ **Last updated:** [January 15, 2025, 7:21pm UTC](https://forums.digi.com/t/xbee-cellular-module-tcp-udp/33899 "2025-01-15T19:21:31Z")
Hi, we’Re tring to use the Xbee module to send data to a server. We are doing our firsts test and we’re trying to send a small string using TCP or UDP protocol but nothing is working. We have setup Destination adress and… --- ## [DIGI XBee 3 Global IOT LTE-M/NB-IoT, socket file descriptor exhaust?](https://forums.digi.com/t/digi-xbee-3-global-iot-lte-m-nb-iot-socket-file-descriptor-exhaust/32626)
**Author:** [@hlyu-coencorp.com](https://forums.digi.com/u/hlyu-coencorp.com)\ **Replies:** 5\ **Last updated:** [September 25, 2024, 4:06pm UTC](https://forums.digi.com/t/digi-xbee-3-global-iot-lte-m-nb-iot-socket-file-descriptor-exhaust/32626 "2024-09-25T16:06:05Z")
I noticed that each time I create a new socket, the fd in it will grow. Will it cause problem with the fd resource being exhausted? Below is a sample test code: when the TCP connection was not successful, I saw in the e… --- ## [XBee 3 LTE-M/NB-IoT "Unknown Error" 0x85 TX Response](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-unknown-error-0x85-tx-response/31602)
**Author:** [@brendansl](https://forums.digi.com/u/brendansl)\ **Replies:** 4\ **Last updated:** [September 18, 2024, 3:36pm UTC](https://forums.digi.com/t/xbee-3-lte-m-nb-iot-unknown-error-0x85-tx-response/31602 "2024-09-18T15:36:10Z")
I am using a XB3-C-A2-UT-001 to periodically send requests to a HTTP server. This is working great most of the time, but occasionally after sending the TX Request frame (0x20), the module will send a Transmit Response fr… --- ## [Detecting SIM card](https://forums.digi.com/t/detecting-sim-card/26462)
**Author:** [@Firmware](https://forums.digi.com/u/Firmware)\ **Replies:** 6\ **Last updated:** [July 12, 2024, 3:20pm UTC](https://forums.digi.com/t/detecting-sim-card/26462 "2024-07-12T15:20:19Z")
Device is Xbee3 LTE-M cell modem. Does the AT interface provide any way to determine / infer if a SIM card is inserted or not? Some modems provide this info, but I didn’t see anything like this in the User Guide. Even… --- ## [XBee3 cellular modems with bug on file system](https://forums.digi.com/t/xbee3-cellular-modems-with-bug-on-file-system/31193)
**Author:** [@ccg](https://forums.digi.com/u/ccg)\ **Replies:** 6\ **Last updated:** [June 4, 2024, 4:16pm UTC](https://forums.digi.com/t/xbee3-cellular-modems-with-bug-on-file-system/31193 "2024-06-04T16:16:07Z")
Hi, according to chagelog of releases firmwares on multiples devices, like XBee LTE Cat1 Global (4151E), Xbee Gloabl LTE-M/NB-IoT (1161E) and others. A critical issue was fixed, “Fixed a critical issue found with some o… --- ## [Socket Bind/Listen API Frame just won't provide any response](https://forums.digi.com/t/socket-bind-listen-api-frame-just-wont-provide-any-response/30842)
**Author:** [@macroniom](https://forums.digi.com/u/macroniom)\ **Replies:** 1\ **Last updated:** [May 9, 2024, 12:17pm UTC](https://forums.digi.com/t/socket-bind-listen-api-frame-just-wont-provide-any-response/30842 "2024-05-09T12:17:33Z")
I have a Digi XBee 3 Cellular Module that I am trying to get to create a socket, and then bind a port with that socket. I was trying to follow this tutorial, and upon creating the socket, I get a “Socket Created Successf… --- ## [XBee 3 Global - High Data Consumption](https://forums.digi.com/t/xbee-3-global-high-data-consumption/30677)
**Author:** [@Larry\_Sellers](https://forums.digi.com/u/Larry_Sellers)\ **Replies:** 2\ **Last updated:** [April 24, 2024, 5:16pm UTC](https://forums.digi.com/t/xbee-3-global-high-data-consumption/30677 "2024-04-24T17:16:39Z")
Hello, Captain Destructo here, got another odd ball with one of my XBee3 Global Low-Power. It’s still sort of connected to another thread I started regarding issues with connect attempts to our cloud storage provider’s… --- ## [Xbee3 LTE PING server problem](https://forums.digi.com/t/xbee3-lte-ping-server-problem/30582)
**Author:** [@barney](https://forums.digi.com/u/barney)\ **Replies:** 5\ **Last updated:** [April 18, 2024, 1:26pm UTC](https://forums.digi.com/t/xbee3-lte-ping-server-problem/30582 "2024-04-18T13:26:47Z")
I am working with the Xbee3 LTE-M modem and trying to get basic stuff working. I am sending AT commands via UART RX and TX lines. I can send several basic commands and get correct results: like ATIM, ATDB 0, ATDT 0 Ho… --- ## [Xbee 3 (XB3-C-GM1-UT-001) Basic Questions](https://forums.digi.com/t/xbee-3-xb3-c-gm1-ut-001-basic-questions/30609)
**Author:** [@barney](https://forums.digi.com/u/barney)\ **Replies:** 1\ **Last updated:** [April 18, 2024, 1:15pm UTC](https://forums.digi.com/t/xbee-3-xb3-c-gm1-ut-001-basic-questions/30609 "2024-04-18T13:15:50Z")
I am currently trying to get the XB3-C-GM1-UT-001 working and have some basic questions. I am trying to send a GET request to the httpbin.org server (as described on p.33 of User Guide) using basic UART communication (I… --- ## [Xbee3 Cellular - Micropython cellular.shutdown vs. cellular.active (airplane mode)](https://forums.digi.com/t/xbee3-cellular-micropython-cellular-shutdown-vs-cellular-active-airplane-mode/28624)
**Author:** [@Larry\_Sellers](https://forums.digi.com/u/Larry_Sellers)\ **Replies:** 4\ **Last updated:** [April 1, 2024, 2:52pm UTC](https://forums.digi.com/t/xbee3-cellular-micropython-cellular-shutdown-vs-cellular-active-airplane-mode/28624 "2024-04-01T14:52:36Z")
Hello, I am updating and debugging code and I see that a new method was added to the Micropython port for shutting down the cellular modem. Specifically it is cellular.shutdown(reset=T/F) method. What the method does … --- ## [XBee3 Global - Not Waking from Deep Sleep](https://forums.digi.com/t/xbee3-global-not-waking-from-deep-sleep/30034)
**Author:** [@Larry\_Sellers](https://forums.digi.com/u/Larry_Sellers)\ **Replies:** 1\ **Last updated:** [March 6, 2024, 2:04pm UTC](https://forums.digi.com/t/xbee3-global-not-waking-from-deep-sleep/30034 "2024-03-06T14:04:22Z")
Hello, I have been continuing my testing and even a few deployments of the new XBee 3 Global, GM2 and GM1, variants. All is going well, however I am starting to see a problem pop up. Fairly randomly, the devices go in… --- ## [XBee3 Global Cat-M/NB-IoT - ENOTCONN errors](https://forums.digi.com/t/xbee3-global-cat-m-nb-iot-enotconn-errors/28626)
**Author:** [@Larry\_Sellers](https://forums.digi.com/u/Larry_Sellers)\ **Replies:** 3\ **Last updated:** [January 30, 2024, 7:42pm UTC](https://forums.digi.com/t/xbee3-global-cat-m-nb-iot-enotconn-errors/28626 "2024-01-30T19:42:00Z")
Hello, Well I had about 2 pages typed and basically deleted most of it for being too long. So hopefully this is succinct. Module: XBee3 Global - Low Power variant (GM1) North America Mode: Micropython REPL Cell Netw… --- ## [XBee3 Global, GM2 Model - Battery Power Recommendations](https://forums.digi.com/t/xbee3-global-gm2-model-battery-power-recommendations/29248)
**Author:** [@Larry\_Sellers](https://forums.digi.com/u/Larry_Sellers)\ **Replies:** 1\ **Last updated:** [January 9, 2024, 9:59pm UTC](https://forums.digi.com/t/xbee3-global-gm2-model-battery-power-recommendations/29248 "2024-01-09T21:59:59Z")
Hello all, I am doing some prototyping with the new Xbee3 Global Cat-m/NB-IoT, GM2 model and running into a minor problem. Just for clarification, this is the higher power variant with the optional 2G fallback. My low… [Next page](https://forums.digi.com/c/xbee-xbee-gateway/xbee-cellular/73.md?page=1)